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| author | Jeffrey Walton <noloader@gmail.com> | 2018-11-10 08:00:14 -0500 |
|---|---|---|
| committer | Jeffrey Walton <noloader@gmail.com> | 2018-11-10 08:00:14 -0500 |
| commit | 896225069db7f34e752dd7b7bb401052c6b7cb17 (patch) | |
| tree | 8d4eabb2bd304b6fe9168aac8fdc28618f3212f8 /ppc_simd.cpp | |
| parent | 776a2195bd78c80130b1809b22a5e4d3aecb5b95 (diff) | |
| download | cryptopp-git-896225069db7f34e752dd7b7bb401052c6b7cb17.tar.gz | |
Rename files with dashes to underscores (GH #736)
Also see https://groups.google.com/forum/#!topic/cryptopp-users/HBz-6gZZFOA on the mailing list
Diffstat (limited to 'ppc_simd.cpp')
| -rw-r--r-- | ppc_simd.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/ppc_simd.cpp b/ppc_simd.cpp new file mode 100644 index 00000000..99616c4f --- /dev/null +++ b/ppc_simd.cpp @@ -0,0 +1,92 @@ +// ppc_simd.cpp - written and placed in the public domain by
+// Jeffrey Walton, Uri Blumenthal and Marcel Raad.
+//
+// This source file uses intrinsics to gain access to AltiVec,
+// Power8 and in-core crypto instructions. A separate source file
+// is needed because additional CXXFLAGS are required to enable the
+// appropriate instructions sets in some build configurations.
+
+#include "pch.h"
+#include "config.h"
+#include "stdcpp.h"
+
+#if defined(CRYPTOPP_ALTIVEC_AVAILABLE)
+# include "ppc_simd.h"
+#endif
+
+#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
+# include <signal.h>
+# include <setjmp.h>
+#endif
+
+#ifndef EXCEPTION_EXECUTE_HANDLER
+# define EXCEPTION_EXECUTE_HANDLER 1
+#endif
+
+// Squash MS LNK4221 and libtool warnings
+extern const char PPC_SIMD_FNAME[] = __FILE__;
+
+NAMESPACE_BEGIN(CryptoPP)
+
+#ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
+extern "C" {
+ typedef void (*SigHandler)(int);
+
+ static jmp_buf s_jmpSIGILL;
+ static void SigIllHandler(int)
+ {
+ longjmp(s_jmpSIGILL, 1);
+ }
+}
+#endif // Not CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
+
+#if (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
+bool CPU_ProbeAltivec()
+{
+#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
+ return false;
+#elif (CRYPTOPP_ALTIVEC_AVAILABLE)
+# if defined(CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY)
+
+ // longjmp and clobber warnings. Volatile is required.
+ // http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
+ volatile int result = true;
+
+ volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
+ if (oldHandler == SIG_ERR)
+ return false;
+
+ volatile sigset_t oldMask;
+ if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
+ return false;
+
+ if (setjmp(s_jmpSIGILL))
+ result = false;
+ else
+ {
+ CRYPTOPP_ALIGN_DATA(16)
+ const byte b1[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+ CRYPTOPP_ALIGN_DATA(16)
+ const byte b2[16] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
+ CRYPTOPP_ALIGN_DATA(16) byte b3[16];
+
+ // Specifically call the Altivec loads and stores
+ const uint8x16_p v1 = (uint8x16_p)vec_ld(0, (byte*)b1);
+ const uint8x16_p v2 = (uint8x16_p)vec_ld(0, (byte*)b2);
+ const uint8x16_p v3 = (uint8x16_p)vec_xor(v1, v2);
+ vec_st(v3, 0, b3);
+
+ result = (0 == std::memcmp(b2, b3, 16));
+ }
+
+ sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
+ signal(SIGILL, oldHandler);
+ return result;
+# endif
+#else
+ return false;
+#endif // CRYPTOPP_ALTIVEC_AVAILABLE
+}
+
+# endif // CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64
+NAMESPACE_END
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